Texas State President Denise Trauth confirmed in a statement Tuesday that Matthew McKinley Ellis, a Phi Kappa Psi pledge, died after attending an off-campus fraternity event, and she announced an immediate suspension of activities of Greek fraternity and sorority chapters at Texas State.

“These chapters are prohibited from holding new-member events, chapter meetings, social functions, and philanthropic activities until a thorough review of the Greek affairs system is completed,” Trauth said.

University spokesman Matt Flores said Ellis, 20, was a business administration sophomore from Humble.

Police said he was pronounced dead at 12:28 p.m. Monday after medics responded to the off-campus Millennium apartments. Friends discovered him a little after 11 a.m. and first responders got the 911 call at 11:35 a.m., officials said.

Police believe Ellis was a pledge for Phi Kappa Psi fraternity, based on interviews with those at the scene, San Marcos police said.

According to a preliminary police investigation, alcohol may have been a factor in Ellis’s death, but his autopsy is still pending, police said. The University Star, Texas State’s student newspaper, said Ellis died after his fraternity’s initiation.

Joanne Smith, vice president for student affairs, is in charge of conducting the review and proposing recommendations for reinstating fraternity and sorority chapters “that demonstrate a commitment to the core values of Texas State and the ideals established by their respective national organizations,” Trauth said. “It is imperative that our entire university community develop a culture that places the highest priority on the safety of its students, faculty, and staff.”